[2] Some time after his commission, King graduated with distinction from the Infantry and Cavalry School at Fort Leavenworth in 1905, and the Army Staff College the following year in 1906.

[8] King emerged from the war decorated with the Army Distinguished Service Medal, the Croix de Guerre, the Legion of Honor and the Order of the Crown.

General King served with distinction as Chief of Staff of the 1st Division in the operations near Montdidier, the advance south of Soissons, and in the attack on the St. Mihiel salient.

Later, as Chief of Staff of the 3d Army Corps during the Meuse-Argonne operation, by his splendid tactical judgment he rendered especially meritorious service.

[9] In July 1924, King was permanently promoted to brigadier general,[9] and in 1925 he was appointed Assistant Chief of Staff, position he would hold until 1929.